There are a number of hotel choices in downtown Portland as well as near the wedding venue. There are also a number of VRBO and Airbnb options. Locations to consider include downtown Portland, South Portland (closer to Cape Elizabeth rather than the mall/airport area), Cape Elizabeth or Scarborough. A list of suggested hotels:
Hotel
Courtyard by Marriott Portland Downtown/Waterfront
321 Commercial Street, Portland, ME 04101
Hotel
Aloft Portland Downtown Waterfront ME
379 Commercial Street, Portland, ME 04101
Hotel
Residence Inn by Marriott Portland Downtown/Waterfront
145 Fore Street, Portland, ME 04101
Hotel
Portland Regency Hotel & Spa
20 Milk Street, Portland, ME 04101
Hotel
Hampton Inn Portland Downtown - Waterfront
209 Fore Street, Portland, ME 04101
Hotel
Higgins Beach Inn
34 Ocean Avenue, Scarborough, ME 04074
Hotel
Inn by the Sea
40 Bowery Beach Road, Cape Elizabeth, ME 04107
Hotel
The Breakers Inn
2 Bayview Avenue, Scarborough, ME 04074 2078834820
House Or Rental
Airbnb/ VRBO
Portland and the Cape Elizabeth area also offer plenty of Airbnb's that accommodate to all family sizes, budgets, and housing preferences.